This little rascal will boot from a USB stick, and may be useful
Ultimate Boot CD - Overview
Hiren's Boot CD will work off of a USB stick, it's also worth looking at as it has a feature called "Mini XP" which loads up a severely cut down version of Win XP so you can trawl through your existing installation to look for problems.
Hiren and Pankaj's Homepage » www.hiren.info
Now, as far as the issue itself goes, "multi(0)disk(0)rdisk(0)partition(2)\Windows\System 32\Drivers\Mup.sys" is not actually the problem because it has loaded. The problem lies with whatever will be loaded AFTER that, which I THINK is likely to be the graphics card driver. Chances are that either the driver is corrupt and needs to be reinstalled or there is corruption in the registry which needs to be repaired